Assembled photovoltaic exterior wall and installation method thereof

Abstract

The present invention discloses an assembled photovoltaic exterior wall and an installation method thereof, comprising: a substrate assembly, wherein the substrate assembly has at least one cavity, the front side of the cavity is open, and the substrate assembly is provided with a slot on both sides of the cavity; at least one photovoltaic panel assembly and at least one ventilation panel assembly, the two sides of the photovoltaic panel assembly and the two sides of the ventilation panel assembly respectively slidingly cooperate with the two slots, and the photovoltaic panel assembly and the ventilation panel assembly together cover the cavity. The photovoltaic panels and ventilation panels integrated in the assembled photovoltaic exterior wall of the present invention are vertically abutted against each other, and the gravity is borne by themselves. The self-supporting design eliminates the need for connecting components between the photovoltaic panels, ventilation panels and the wall, saving material costs. The upper and lower ventilation panels and the cavity form a chimney effect that is beneficial to heat dissipation of the photovoltaic panels.

Description

Technical Field

[0001] The present invention relates to the technical field of assembled building exterior wall panels, and in particular to an assembled photovoltaic exterior wall and an installation method thereof. Background Art

[0002] As a new energy application technology integrated with buildings, building integrated photovoltaic (BIPV) technology has been widely used. Conventional BIPV technology is generally used for later installation on existing buildings. However, to install photovoltaic modules on existing roofs or facades, it is necessary to install the module support structure, i.e., the bracket, in advance. This installation method requires additional bracket material costs, is difficult to install, has a long installation cycle, and is expensive to install. It will also damage the waterproof and insulation layers of the original building and cause some irreversible damage to the wall. Another BIPV technology is to replace building materials with photovoltaic modules as part of the building, that is, to use photovoltaic modules to make the roof, exterior walls and windows of the building. Although the integration and integration are high, there are high requirements for the thermal insulation, waterproofing, safety and fire protection of photovoltaic modules, so the design is difficult and the cost is high.

[0003] For photovoltaic exterior walls, existing patented technologies can be roughly divided into two categories. The first category uses pre-embedded connecting components to secure the wall to the photovoltaic modules, such as CN113958022A and CN208965820U. The second category uses grooves in precast concrete walls to embed the photovoltaic modules within the walls, such as CN208088559U, CN209057145U, CN215253657U, and CN211114264 U. In the former, the weight of the photovoltaic panels is transferred to the wall through pre-embedded connectors, which places high demands on the strength, rigidity, and installation method of the connectors. The material and installation costs of the connectors have, to a certain extent, limited their widespread application. The latter has a groove reserved in the wall, and the gravity of the photovoltaic module is directly transferred to the platform formed by the groove in the wall, which saves the cost of installing the bracket and is safer. However, only one photovoltaic module can be installed vertically in a groove. If multiple modules are installed vertically, multiple grooves need to be opened vertically, and sufficient width should be left between the grooves to bear the gravity of the photovoltaic panels, which will result in a smaller area of ​​the wall that can generate electricity. Summary of the Invention

[0004] In response to the above-mentioned problems existing in the existing photovoltaic exterior walls, the present invention aims to provide an assembled photovoltaic exterior wall and its installation method. The photovoltaic panels and ventilation panels integrated in the assembled photovoltaic exterior wall are vertically abutted against each other, and the gravity is borne by itself. The self-supporting design eliminates the connecting components between the photovoltaic panels, ventilation panels and the wall, saving material costs. The upper and lower ventilation panels and the cavity form a chimney effect, which is beneficial to the heat dissipation of the photovoltaic panels.

[0005] The specific technical solutions are as follows:

[0006] An assembled photovoltaic exterior wall comprises: a substrate assembly having at least one cavity, the front side of the cavity being open, and the substrate assembly having a slot on each side of the cavity;

[0007] At least one photovoltaic panel assembly and at least one ventilation panel assembly, both sides of the photovoltaic panel assembly and both sides of the ventilation panel assembly are respectively slidably matched with the two slots, and the photovoltaic panel assembly and the ventilation panel assembly together cover the cavity.

[0008] The above-mentioned assembled photovoltaic exterior wall, wherein the ventilation plate assembly includes: an upper ventilation plate and a lower ventilation plate, the two sides of the upper ventilation plate and the two sides of the lower ventilation plate are respectively slidably matched with the two slots, the bottom of the lower ventilation plate is against the bottom of the cavity, and the top and bottom parts of the photovoltaic panel assembly are respectively against the bottom of the upper ventilation plate and the bottom of the lower ventilation plate.

[0009] The above-mentioned assembled photovoltaic exterior wall, wherein the photovoltaic panel assembly includes several photovoltaic panels that are abutted in sequence from top to bottom, and the two sides of the several photovoltaic panels are respectively slidably matched with the two slots, the photovoltaic panel located at the bottom abuts against the bottom of the lower ventilation plate, and the photovoltaic panel located at the top abuts against the bottom of the upper ventilation plate.

[0010] The above-mentioned assembled photovoltaic exterior wall, wherein the top of the substrate assembly has a plurality of upper connection holes connected to the cavity, the bottom of the substrate assembly has a plurality of lower connection holes connected to the cavity, and both sides of the substrate assembly have a plurality of side wall connection holes connected to the cavity.

[0011] The above-mentioned assembled photovoltaic exterior wall, wherein horizontal sealing strips are provided between two adjacent photovoltaic panels, between the photovoltaic panel located at the top and the bottom of the upper ventilation plate, between the photovoltaic panel located at the bottom and the top of the lower ventilation plate, and between the bottom of the lower ventilation plate and the bottom of the cavity, and vertical sealing strips are provided in the slots.

[0012] In the above-mentioned assembled photovoltaic exterior wall, the top of the substrate assembly has a concave cavity that penetrates the cavity, and the tops of the two slots extend to both sides of the concave cavity respectively.

[0013] The above-mentioned assembled photovoltaic exterior wall, wherein the substrate assembly comprises: a substrate and at least two inserts, wherein the substrate has at least one cavity, and the two inserts are fixedly disposed on both sides of the cavity, and both inserts have the slots;

[0014] The base plate has steps on both sides of the cavity. Each of the inserts includes an insert and a connecting piece connected to each other. The insert is limited to the steps. The connecting piece is fixedly connected to the base plate. The side wall of the insert has the slot.

[0015] In the above-mentioned assembled photovoltaic exterior wall, a junction box is provided in the cavity, and the thickness of the junction box is smaller than the depth of the cavity.

[0016] The above-mentioned assembled photovoltaic exterior wall, wherein the substrate assembly includes: at least two substrates, each of which is provided with the cavity, the photovoltaic panel assembly and the ventilation panel assembly are installed at the opening of each cavity, the two substrates are fixedly connected by a plurality of connecting members, each of the connecting members includes: a screw and two nuts, the screw passes through one side of the two substrates, the two ends of the screw respectively extend into the two cavities, and the two nuts are respectively fixedly connected to the two ends of the two screws;

[0017] The screw rod passes through the two base plates and the two connecting pieces, and the two nuts are fixedly connected to the two ends of the two screw rods respectively.

[0018] In the above-mentioned assembled photovoltaic exterior wall, a plurality of wiring holes are provided on both sides of the substrate, and the wiring holes are respectively connected to the cavity.

[0019] A method for installing an assembled photovoltaic exterior wall, wherein the method is used to install any one of the assembled photovoltaic exterior walls described above, and the method comprises:

[0020] Step S1: connecting the lower connection hole of the first base plate to the lower main structure of the building;

[0021] Step S2: embedding the two inserts into the two steps of the first substrate respectively;

[0022] Step S3: placing the second substrate against the sidewall of the first substrate;

[0023] Step S4: embedding the other two inserts into the two steps of the second substrate respectively;

[0024] Step S5: Passing the screw through the two substrates, with both ends of the screw extending into the two cavities respectively, and fixing the two substrates with two nuts at both ends of the screw;

[0025] Step S6: connecting the lower connection hole of the second base plate to the lower main structure of the building;

[0026] Step S7: The lower ventilation plate, several photovoltaic panels and the upper ventilation plate are inserted into the two substrates in sequence, and the horizontal sealing strips are laid between two adjacent photovoltaic panels, between the photovoltaic panel at the top and the bottom of the upper ventilation plate, between the photovoltaic panel at the bottom and the top of the lower ventilation plate, and between the bottom of the lower ventilation plate and the bottom of the cavity, and the vertical sealing strips are laid in the slots to complete the assembly of a photovoltaic exterior wall.

[0027] Compared with the prior art, the above technical solution has the following positive effects:

[0028] The photovoltaic panels and ventilation panels integrated in the assembled photovoltaic exterior wall of the present invention are vertically abutted against each other, and the gravity is borne by themselves. The self-supporting design eliminates the need for connecting components between the photovoltaic panels, ventilation panels and the wall, saving material costs.

[0029] The upper and lower ventilation plates and the cavity of the present invention form a chimney effect, which is beneficial to the heat dissipation of the photovoltaic panel;

[0030] The screw rod of the present invention connects two adjacent substrates and fixes the cutting strips at the same time, thereby fixing the photovoltaic panel and the ventilation panel, eliminating the need for pre-buried connectors, making the pre-assembled components simple to manufacture and convenient for on-site installation.

[0031] The cavity of the present invention can be used to place a junction box, and wiring holes are reserved on both sides of the substrate to fully utilize the cavity space to arrange electrical circuits;

[0032] The photovoltaic panel and ventilation panel insert-type installation method of the present invention is convenient for on-site installation, saves installation costs, and facilitates the replacement of photovoltaic panels in the future.

[0033] The waterproof design of the rainproof louvers of the ventilation plate of the present invention and the drainage design of the lower ventilation opening ensure that the electrical components of the photovoltaic module are protected from the influence of rainwater, thereby improving the weather resistance of the photovoltaic wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic diagram of the overall structure of an assembled photovoltaic exterior wall and its installation method according to the present invention;

[0035] Figure 2 This is a schematic diagram of the exploded structure of an assembled photovoltaic exterior wall and its installation method according to the present invention;

[0036] Figure 3 This is a front view of the overall structure of an assembled photovoltaic exterior wall and its installation method according to the present invention;

[0037] Figure 4 The present invention is an assembled photovoltaic exterior wall and its installation method Figure 3 Cross-sectional view in the AA direction;

[0038] Figure 5The present invention is an assembled photovoltaic exterior wall and its installation method Figure 4 Enlarged view of point D in the middle;

[0039] Figure 6 The present invention is an assembled photovoltaic exterior wall and its installation method Figure 3 Cross-sectional view in the middle BB direction;

[0040] Figure 7 The present invention is an assembled photovoltaic exterior wall and its installation method Figure 6 Enlarged view of point E in the middle;

[0041] Figure 8 This is a structural schematic diagram of a substrate of an assembled photovoltaic exterior wall and an installation method thereof according to the present invention;

[0042] Figure 9 This is a structural diagram of the inserts in the first embodiment of an assembled photovoltaic exterior wall and an installation method thereof according to the present invention;

[0043] Figure 10 This is a structural diagram of the inserts in the second embodiment of an assembled photovoltaic exterior wall and an installation method thereof according to the present invention;

[0044] In the accompanying drawings: 1. Baseboard assembly; 2. Photovoltaic panel assembly; 3. Ventilation panel assembly; 4. Cavity; 5. Slot; 6. Concave cavity; 7. Connector; 11. Baseboard; 12. Insert; 13. Step; 14. Insert; 15. Connecting piece; 16. Wiring hole; 17. Side wall connecting hole; 21. Photovoltaic panel; 31. Upper ventilation panel; 32. Lower ventilation panel; 33. Drain outlet; 41. Upper connecting hole; 42. Lower connecting hole; 71. Screw; 72. Nut. DETAILED DESCRIPTION

[0045] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0046] Figure 1 This is a schematic diagram of the overall structure of an assembled photovoltaic exterior wall and its installation method according to the present invention;

[0047] Figure 2 This is a schematic diagram of the exploded structure of an assembled photovoltaic exterior wall and its installation method according to the present invention;

[0048] Figure 3 This is a front view of the overall structure of an assembled photovoltaic exterior wall and its installation method according to the present invention;

[0049] Figure 4 The present invention is an assembled photovoltaic exterior wall and its installation method Figure 3 Cross-sectional view in the AA direction;

[0050] Figure 5The present invention is an assembled photovoltaic exterior wall and its installation method Figure 4 Enlarged view of point D in the middle;

[0051] Figure 6 The present invention is an assembled photovoltaic exterior wall and its installation method Figure 3 Cross-sectional view in the middle BB direction;

[0052] Figure 7 The present invention is an assembled photovoltaic exterior wall and its installation method Figure 6 Enlarged view of point E in the middle;

[0053] Figure 8 This is a structural schematic diagram of a substrate of an assembled photovoltaic exterior wall and an installation method thereof according to the present invention;

[0054] Figure 9 This is a structural diagram of the inserts in the first embodiment of an assembled photovoltaic exterior wall and an installation method thereof according to the present invention;

[0055] Figure 10 This is a schematic diagram of the structure of the insert in the second embodiment of an assembled photovoltaic exterior wall and its installation method of the present invention, as shown in FIG. Figures 1 to 10 As shown, a preferred embodiment of an assembled photovoltaic exterior wall is shown, including: a substrate assembly 1, at least one photovoltaic panel assembly 2 and at least one ventilation panel assembly 3, the substrate assembly 1 has at least one cavity 4, the front side of the cavity 4 is open, the substrate assembly 1 is located on both sides of the cavity 4 and has a slot 5, the two sides of the photovoltaic panel assembly 2 and the two sides of the ventilation panel assembly 3 are respectively slidably fitted with the two slots 5, and the photovoltaic panel assembly 2 and the ventilation panel assembly 3 cover the cavity 4 together.

[0056] Furthermore, as a preferred embodiment, the ventilation plate assembly 3 includes: an upper ventilation plate 31 and a lower ventilation plate 32, the two sides of the upper ventilation plate 31 and the two sides of the lower ventilation plate 32 are respectively slidably fitted with the two slots 5, the bottom of the lower ventilation plate 32 is against the bottom of the cavity 4, and the top and bottom of the photovoltaic panel assembly 2 are respectively against the bottom of the upper ventilation plate 31 and the bottom of the lower ventilation plate 32.

[0057] Furthermore, as a preferred embodiment, the photovoltaic panel assembly 2 includes a number of photovoltaic panels 21 that are abutted in sequence from top to bottom, and the two sides of the number of photovoltaic panels 21 are respectively slidably fitted with the two slots 5, the photovoltaic panel 21 at the bottom abuts against the bottom of the lower ventilation plate 32, and the photovoltaic panel 21 at the top abuts against the bottom of the upper ventilation plate 31.

[0058] Furthermore, as a preferred embodiment, the top of the substrate assembly 1 has several upper connection holes 41 connected to the cavity 4, the bottom of the substrate assembly 1 has several lower connection holes 42 connected to the cavity 4, and both sides of the substrate assembly 1 have several side wall connection holes 17 connected to the cavity 4.

[0059] The above are only preferred embodiments of the present invention and are not intended to limit the implementation and protection scope of the present invention.

[0060] The present invention also has the following implementation modes based on the above:

[0061] In further embodiments of the present invention, please continue to refer to Figures 1 to 10 As shown, horizontal sealing strips are provided between adjacent photovoltaic panels 21, between the photovoltaic panel 21 at the top and the bottom of the upper ventilation plate 31, between the photovoltaic panel 21 at the bottom and the top of the lower ventilation plate 32, and between the bottom of the lower ventilation plate 32 and the bottom of the cavity 4, and vertical sealing strips are provided in the slots 5.

[0062] Preferably, in addition to the sealing function, the sealing strip also prevents rigid contact between the photovoltaic panels 21 , between the photovoltaic panels 21 and the inserts 12 , and between the photovoltaic panels 21 and the upper and lower ventilation panels.

[0063] In a further embodiment of the present invention, the top of the substrate assembly 1 has a concave cavity 6 that penetrates the cavity 4 , and the tops of the two slots 5 extend to both sides of the concave cavity 6 respectively.

[0064] In a further embodiment of the present invention, the substrate assembly 1 includes a substrate 11 and at least two inserting strips 12 . The substrate 11 has at least one cavity 4 . The two inserting strips 12 are fixed on both sides of the cavity 4 . Both inserting strips 12 have slots 5 .

[0065] In a further embodiment of the present invention, the substrate 11 has steps 13 on both sides of the cavity 4, and each insertion strip 12 includes an insert 14 and a connecting piece 15 connected to each other. The insert 14 is limited to the step 13, and the connecting piece 15 is fixedly connected to the substrate 11. The side wall of the insert 14 has a slot 5.

[0066] In a further embodiment of the present invention, a junction box (not shown in the figures) is provided in the cavity 4 , and the thickness of the junction box is smaller than the depth of the cavity 6 .

[0067] In a further embodiment of the present invention, the substrate assembly 1 includes: at least two substrates 11, each substrate 11 is provided with a cavity 4, and a photovoltaic panel assembly 2 and a ventilation panel assembly 3 are installed at the open part of each cavity 4. The two substrates 11 are fixedly connected by a number of connecting parts 7, and each connecting part 7 includes: a screw 71 and two nuts 72. The screw 71 passes through one side of the two substrates 11, and the two ends of the screw 71 extend into the two cavities 4 respectively. The two nuts 72 are fixedly connected to the two ends of the two screws 71 respectively.

[0068] In a further embodiment of the present invention, the screw rod 71 passes through the two base plates 11 and the two connecting pieces 15 , and the two nuts 72 are fixedly connected to both ends of the two screw rods 71 ​​.

[0069] In a further embodiment of the present invention, a plurality of side wall connection holes 17 are provided on both sides of the substrate 11 , and the side wall connection holes 17 are used for the connection members 7 to pass through.

[0070] In a further embodiment of the present invention, wiring holes 16 are provided on both sides of the substrate 11 , and the wiring holes 16 are respectively connected to the cavity 4 .

[0071] Preferably, the inserting strip 12 is provided with a plurality of side wall connection holes 17 , which are respectively opposite to the plurality of side wall connection holes 17 on the base plate 11 .

[0072] Preferably, there can be only one or several connecting pieces 15. When there is only one connecting piece 15, the connecting piece 15 is provided with several side wall connecting holes 17 and at least one wiring hole 16, and the wiring hole 16 is opposite to the wiring hole on the substrate 11. When there are several connecting pieces 15, several connecting pieces 15 are each provided with a side wall connecting hole 17.

[0073] The present invention provides a method for installing an assembled photovoltaic exterior wall, wherein the method is used to install the assembled photovoltaic exterior wall, and the method includes:

[0074] Step S1: Connect the lower connection hole 42 of the first base plate 11 to the lower main structure of the building;

[0075] Step S2: embedding the two inserts 12 into the two steps 13 of the first substrate 11 respectively;

[0076] Step S3: placing the second substrate 11 against the sidewalls of the first substrate 11 ;

[0077] Step S4: embedding the other two inserts 12 into the two steps 13 of the second substrate 11 respectively;

[0078] Step S5: Pass the screw 71 through the two substrates 11, and extend the two ends of the screw 71 into the two cavities 4 respectively, and use two nuts 72 to fix the two ends of the screw 71 to fix the two substrates 11;

[0079] Step S6: Connect the lower connection hole 42 of the second base plate 11 to the lower main structure of the building;

[0080] Step S7: Insert the lower ventilation plate 32, several photovoltaic panels 21 and the upper ventilation plate 31 on the two substrates 11 in sequence, and lay horizontal sealing strips between two adjacent photovoltaic panels 21, between the photovoltaic panel 21 at the top and the bottom of the upper ventilation plate 31, between the photovoltaic panel 21 at the bottom and the top of the lower ventilation plate 32, and between the bottom of the lower ventilation plate 32 and the bottom of the cavity 4, and lay vertical sealing strips in the slots 5 to complete the assembly of a photovoltaic exterior wall.

[0081] Preferably, a plurality of drainage openings 33 are provided on the upper ventilation plate 31 and the lower ventilation plate 32 , and rainproof louvers are provided on the upper ventilation plate 31 and the lower ventilation plate 32 .

[0082] Preferably, the base plate 11 has a drainage slope at the bottom of the cavity 4. Preferably, the bottom of the cavity 4 is tilted downward; the drainage port of the lower ventilation plate 32 matches the bottom of the cavity 4.

[0083] Preferably, the base plate 11 is prefabricated as a whole with cement mortar or concrete, and structural steel bars are arranged therein and hooks are embedded in advance.

[0084] The photovoltaic panels 21 and ventilation panels integrated in the assembled photovoltaic exterior wall of the present invention are vertically abutted against each other, and the gravity is borne by themselves. The self-supporting design eliminates the need for connecting components between the photovoltaic panels, ventilation panels and the wall, saving material costs.

[0085] The upper and lower ventilation plates and the cavity 4 of the present invention form a chimney effect that is beneficial to the heat dissipation of the photovoltaic panel;

[0086] The screw rod 71 of the present invention connects two adjacent substrates and fixes the insert 12, thereby fixing the photovoltaic panel 21 and the ventilation panel, eliminating the need for pre-buried connectors, making the prefabricated components simple to manufacture and convenient for on-site installation.

[0087] The cavity 4 of the present invention can be used to place a junction box, and wiring holes are reserved on the substrate 11 to fully utilize the cavity space to arrange electrical circuits;

[0088] The photovoltaic panel 21 and ventilation panel insert-type installation method of the present invention is convenient for on-site installation, saves installation costs, and facilitates the replacement of photovoltaic panels at a later stage;

[0089] The waterproof design of the rainproof louvers of the ventilation plate of the present invention and the drainage design of the lower ventilation opening ensure that the electrical components of the photovoltaic module are protected from the influence of rainwater, thereby improving the weather resistance of the photovoltaic wall.

[0090] The above description is only a preferred embodiment of the present invention and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for installing an assembled photovoltaic exterior wall, characterized in that: Used to install the assembled photovoltaic exterior wall, the assembled photovoltaic exterior wall includes: A substrate assembly, wherein the substrate assembly has at least one cavity, the front side of the cavity is open, and the substrate assembly has a slot on both sides of the cavity; at least one photovoltaic panel assembly and at least one ventilation panel assembly, two sides of the photovoltaic panel assembly and two sides of the ventilation panel assembly are respectively slidably engaged with the two slots, and the photovoltaic panel assembly and the ventilation panel assembly together cover the cavity; The ventilation plate assembly includes: an upper ventilation plate and a lower ventilation plate, both sides of the upper ventilation plate and both sides of the lower ventilation plate are respectively slidably matched with the two slots, the bottom of the lower ventilation plate is against the bottom of the cavity, and the top and bottom of the photovoltaic panel assembly are respectively against the bottom of the upper ventilation plate and the top of the lower ventilation plate; The photovoltaic panel assembly includes a plurality of photovoltaic panels abutted in sequence from top to bottom, with both sides of the plurality of photovoltaic panels slidingly engaged with the two slots respectively, the photovoltaic panel at the bottom abutting against the top of the lower ventilation panel, and the photovoltaic panel at the top abutting against the bottom of the upper ventilation panel; The top of the substrate assembly has a plurality of upper connection holes communicating with the cavity, the bottom of the substrate assembly has a plurality of lower connection holes communicating with the cavity, and both sides of the substrate assembly have a plurality of side wall connection holes communicating with the cavity; Horizontal sealing strips are provided between two adjacent photovoltaic panels, between the photovoltaic panel at the top and the bottom of the upper ventilation plate, between the photovoltaic panel at the bottom and the top of the lower ventilation plate, and between the bottom of the lower ventilation plate and the bottom of the cavity, and vertical sealing strips are provided in the slots; The top of the substrate assembly has a concave cavity that penetrates the cavity, and the tops of the two slots extend to both sides of the concave cavity respectively; The substrate assembly includes: a substrate and at least two inserts, wherein the substrate has at least one cavity, the two inserts are fixedly disposed on both sides of the cavity, and both inserts have the slots; The base plate is provided with steps on both sides of the cavity, and each of the inserts comprises an insert and a connecting piece connected to each other, the insert is limitedly located on the steps, the connecting piece is fixedly connected to the base plate, and the side wall of the insert has the slot; The substrate assembly includes: at least two substrates, each of which is provided with the cavity, the photovoltaic panel assembly and the ventilation panel assembly are installed at the opening of each cavity, the two substrates are fixedly connected by a plurality of connecting members, each of the connecting members includes: a screw and two nuts, the screw passes through one side of the two substrates, the two ends of the screw respectively extend into the two cavities, and the two nuts are fixedly connected to the two ends of the two screws respectively; The screw rod passes through the two base plates and the two connecting pieces, and the two nuts are fixedly connected to the two ends of the two screw rods respectively; The installation method includes: Step S1: connecting the lower connection hole of the first base plate to the lower main structure of the building; Step S2: embedding the two inserts into the two steps of the first substrate respectively; Step S3: placing the second substrate against the sidewall of the first substrate; Step S4: embedding the other two inserts into the two steps of the second substrate respectively; Step S5: Passing the screw through the two substrates, with both ends of the screw extending into the two cavities respectively, and fixing the two substrates with two nuts at both ends of the screw; Step S6: connecting the lower connection hole of the second base plate to the lower main structure of the building; Step S7: The lower ventilation plate, several photovoltaic panels and the upper ventilation plate are inserted into the two substrates in sequence, and the horizontal sealing strips are laid between two adjacent photovoltaic panels, between the photovoltaic panel at the top and the bottom of the upper ventilation plate, between the photovoltaic panel at the bottom and the top of the lower ventilation plate, and between the bottom of the lower ventilation plate and the bottom of the cavity, and the vertical sealing strips are laid in the slots to complete the assembly of a photovoltaic exterior wall.

2. The method for installing an assembled photovoltaic exterior wall according to claim 1, characterized in that: A junction box is provided in the cavity, and the thickness of the junction box is smaller than the depth of the cavity.

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